我在资产文件夹中有一个数据库。它在 Android 4.0 上运行良好，但在 2.2 或 2.1 上它在复制数据库时抛出错误。这是来自日志：
Data exceeds UNCOMPRESS_DATA_MAX (1532928 vs 1048576)
这是否意味着文件太大？
OpenHelper 的代码：
public static class DictionaryOpenHelper extends SQLiteOpenHelper
{
private final Context mHelperContext;
private SQLiteDatabase mDatabase;
private static String DB_PATH="/data/data/com.example.enigmar/databases/";
private static final String DB_NAME = "gesla.db";
DictionaryOpenHelper(Context context)
{
super(context, DB_NAME, null, 1);
this.mHelperContext = context;
}
@Override
public void onCreate(SQLiteDatabase db)
{
}
public void createDataBase() throws IOException
{
boolean mDataBaseExist = checkDataBase();
if(!mDataBaseExist)
{
this.getReadableDatabase();
this.close();
try
{
copyDataBase();
Log.e(TAG, "createDatabase database created");
}
catch (IOException mIOException)
{
throw new Error("ErrorCopyingDataBase");
}
}
}
private boolean checkDataBase()
{
File dbFile = new File(DB_PATH + DB_NAME);
return dbFile.exists();
}
private void copyDataBase() throws IOException
{
InputStream mInput = mHelperContext.getAssets().open(DB_NAME);
String outFileName = DB_PATH + DB_NAME;
OutputStream mOutput = new FileOutputStream(outFileName);
byte[] mBuffer = new byte[1024];
int mLength;
while ((mLength = mInput.read(mBuffer))>0)
{
mOutput.write(mBuffer, 0, mLength);
}
mOutput.flush();
mOutput.close();
mInput.close();
}
public boolean openDataBase() throws SQLException
{
String mPath = DB_PATH + DB_NAME;
mDatabase = SQLiteDatabase.openDatabase(mPath, null, SQLiteDatabase.CREATE_IF_NECESSARY);
return mDatabase != null;
}
@Override
public synchronized void close() {
if(mDatabase != null)
mDatabase.close();
super.close();
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
}
}